Ball-toothed driving-gear.



No. 636,007. Patented Oct. 3|, 1899.

o. SEHRWALD.

BALL TOOTHED DRIVING GEAR.

(Application filed Dec. 7, 1898,)

' (No Model.)

WL' Zness es Iii/1 621203" UNITED STATES PATENT OFFICE.

OTTO SEI-IRWALD, OF HAMBURG, GERMANY.

BALL- TQOTHED DRlVlNG -GEAR.

, SPECIFICATION forming part of Letters Patent Ito. 636,007, dated October 31, 1899.

I Application filed December 7, 1898. serial No. 698,537. (No model.)

To aZZ whom it may concern:

Be it known that I, OTTO SEHRWALD, merchant, a subject of the King of Prussia, German Emperor, residing at 28 Marienstrasse, Hamburg, St. Paula, Germany, haveinvented new and useful Improvements in Ball-Toothed Drfving- Gear, oLwhich the following is a specification.

This invention relates to that class of gearing wherein loose rollers or balls take the place of teeth in transmitting motion with the object of reducing friction to the minimum. With this end in view the invention consists in certain novel features of construction and combination of parts hereinafter described and the essential elements of which are recited in the appended claim.

The accompanying drawings show several examples of the manner of carrying this invention into practice and of utilizing the same.

Figures 1 to 4 illustrate the use of spherical teeth for front wheels.

Upon the shaft a are arranged the sockets b b, which receive the balls 0. One of these sockets b is rendered adjustable and issecured in position by means of a counter-nut 12 At one point the balls bear against a tooth c of the socket, so that the former may not be able to roll therein. The balls are arranged in two rows and are supported by a toothed ring 01, having the form of a double cone and loosely surrounding the shaft a. Between each four balls gear, as shown in Figs. 3 and 4, the teeth of the gear-wheel e, fixed to the second shaft f. As soon as the latter turns the balls are carried away with the sockets b I), mounted on the driven shaft a. The balls turn and roll in such a manner that very little friction is developed against the sides of the teeth.

Instead of two rows of balls one row may be deemed sufficient, the teeth of the gearwheel surrounding them like a fork.

When the rows of balls have no need of being tightly arranged one upon the other, the teeth of the wheel 6 may, as shown in Fig. 5,

be arranged on both sides of a plate. The sockets b b for the balls may be likewise pro= vided with teeth, as shown in Fig. 6.

In Fig. 7 is shown the application of the invention to bevelewheels. In this case two balls 0 c of different sizes are used, so that a bevel-wheel can be treated in exactly the same manner as in Fig. 1. The toothed wheel e must obviously have likewise a conical shape.

, Figs. 8 and 9 show an arrangement of teeth for planet-wheels, a crank-arm '6 being fixed on one of the shafts h, in order to carry the sockets b b. The latter are furnished with teeth 0', so that the conical ring may be free to turn around. In this ring engages outside a fixed wheel 76 and inside the toothed wheel Z, mounted on the second spindle 9. When, for instance, the spindle h is rotated, the Wheel formed of the balls 0' turns within is and transmits motion to the shaft 9'. Obviously Z could be fixed and k be connected with the second spindle. Such toothed. wheels may be used for all mechanical purposes, but are more particularly intended for velocipedes.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

Ball-toothed driving-gear, comprising in combination two adjustable ball-retaining disks mounted on a common axle, a looselymounted ring inclosed by said disks, said disks and ring having rows of sockets for balls, balls seated in said sockets and prevented from rolling by projecting teeth, and another wheel having its perimeter fitted to mesh with said balls, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

OTTO SEHRWALD.

Witnesses:

EMIL Wi'IRFEL, E. H. L. .MUMMENHOFF. 

